| 07:55 MST |  Obscured Fog | -1°C / 30°F | -2°C / 28°F | 93% | 1018 mb (30.06 in) | Calm | - | 1/4SM |
| | KGPI 261455Z 00000KT 1/4SM FZFG VV001 M01/M02 A3007 RMK AO2 SLP210 T10061022 58010 |
| 06:55 MST |  Obscured Fog | -1°C / 30°F | -2°C / 28°F | 93% | 1019 mb (30.09 in) | Calm | - | 1/4SM |
| | KGPI 261355Z AUTO 00000KT 1/4SM FZFG VV001 M01/M02 A3008 RMK AO2 SLP215 T10061022 |
| 05:55 MST |  Obscured Fog | -1°C / 30°F | -2°C / 28°F | 93% | 1019 mb (30.09 in) | Calm | - | 1/4SM |
| | KGPI 261255Z AUTO 00000KT 1/4SM FZFG VV001 M01/M02 A3008 RMK AO2 SLP213 T10061017 |
| 04:55 MST |  Obscured Fog | -1°C / 30°F | -2°C / 28°F | 93% | 1019 mb (30.09 in) | Calm | - | 1/4SM |
| | KGPI 261155Z 00000KT 1/4SM FZFG VV001 M01/M02 A3010 RMK AO2 SLP215 60000 T10061022 11006 21033 58013 |
| 04:09 MST |  Obscured Fog | -1°C / 30°F | -2°C / 28°F | 93% | 1020 mb (30.12 in) | Calm | - | 1/4SM |
| | KGPI 261109Z 00000KT 1/4SM FZFG VV001 M01/M02 A3011 RMK AO2 |
| 03:55 MST |  Obscured Fog | -1°C / 30°F | -2°C / 28°F | 93% | 1020 mb (30.12 in) | Calm | - | 1/4SM |
| | KGPI 261055Z 00000KT 1/4SM FZFG VV002 M01/M02 A3012 RMK AO2 SLP220 T10111022 |
| 03:42 MST |  Overcast Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1020 mb (30.12 in) | Calm | - | 1/4SM |
| | KGPI 261042Z 00000KT 1/4SM FZFG OVC002 M02/M03 A3012 RMK AO2 |
| 03:35 MST |  Overcast Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1020 mb (30.12 in) | Calm | - | 1/2SM |
| | KGPI 261035Z 00000KT 1/2SM FZFG OVC002 M02/M03 A3012 RMK AO2 |
| 03:28 MST |  Obscured Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1020 mb (30.12 in) | Calm | - | 1/4SM |
| | KGPI 261028Z 00000KT 1/4SM FZFG VV002 M02/M03 A3012 RMK AO2 |
| 03:14 MST |  Obscured Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1020 mb (30.12 in) | Calm | - | 1/4SM |
| | KGPI 261014Z 00000KT 1/4SM FZFG VV001 M02/M03 A3013 RMK AO2 |
| 02:55 MST |  Overcast Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1020 mb (30.12 in) | Calm | - | 1/4SM |
| | KGPI 260955Z 00000KT 1/4SM FZFG OVC002 M02/M03 A3013 RMK AO2 SLP224 T10171028 |
| 02:45 MST |  Overcast Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1020 mb (30.12 in) | Calm | - | 1/4SM |
| | KGPI 260945Z 00000KT 1/4SM FZFG OVC002 M02/M03 A3013 RMK AO2 |
| 01:55 MST |  Obscured Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1021 mb (30.15 in) | Calm | 0.00 mm (0.00 in) | 1/4SM |
| | KGPI 260855Z 00000KT 1/4SM FZFG VV001 M02/M03 A3014 RMK AO2 SNB13E24 SLP229 P0000 60000 T10221033 56011 |
| 01:07 MST |  Overcast Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1021 mb (30.15 in) | Calm | - | 1/4SM |
| | KGPI 260807Z 00000KT 1/4SM FZFG BKN001 OVC006 M02/M03 A3014 RMK AO2 |
| 00:55 MST |  Overcast Fog | -2°C / 28°F | -3°C / 27°F | 93% | 1021 mb (30.15 in) | Calm | - | 1/4SM |
| | KGPI 260755Z 00000KT 1/4SM FZFG SCT001 OVC006 M02/M03 A3015 RMK AO2 SLP232 T10221033 |
| 00:43 MST |  Overcast Fog | -3°C / 27°F | -4°C / 25°F | 93% | 1021 mb (30.15 in) | Calm | - | 1/4SM |
| | KGPI 260743Z 00000KT 1/4SM FZFG FEW001 OVC006 M03/M04 A3015 RMK AO2 |
| 00:33 MST |  Overcast Fog And Mist | -3°C / 27°F | -4°C / 25°F | 93% | 1021 mb (30.15 in) | Calm | - | 3/4SM |
| | KGPI 260733Z 00000KT 3/4SM BR SCT001 OVC006 M03/M04 A3015 RMK AO2 |